Schweitzer Engineering Laboratories SEL-701 - 10 H Preset Multiple Registers Command

Date Code 20010719 701 Motor Protection Relay
Modbus
®
RTU Communications Protocol
10h Preset Multiple Registers Command
C.13
10h Preset Multiple Registers Command
This function code works much like code 06h, except that it allows you to write
multiple registers at once, up to 100 per operation. Normally, this function code will
only be used to write source addresses in the User map region. If you are accustomed
to 4X references with the function code, for 6-digit addressing, simply add 400001 to
the standard database addresses.
Table C.13 10 h Preset Multip le Registers Com mand
Table C.13 10h Preset Multiple Registers Command
Bytes Field
The Master Request Must Have the Following Format
1 byte Slave address
1 byte Function code (10h)
2 bytes Starting address
2 bytes Number of registers to write
1 byte Byte count (should be twice number of registers)
n bytes Byte count bytes of data
2 bytes CRC-16 for message
A Successful SEL-701 Relay Response Will Have the Following Format
1 byte Slave address
1 byte Function code (10h)
2 bytes Starting address
2 bytes Number of registers
2 bytes CRC-16 for message